The Dead Sea Scrolls in Israel are real. The ones in one museum in America were forges.
Has it been confirmed by (non-israli/non-american/non-jewish) scientists?
A lot of the early work was done by Americans, but that's more because it was the immediate post-war period and that's who had money and access at the time; if they were found any earlier it would have likely been Brits taking the initial look.